57 lines
1.7 KiB
Diff
57 lines
1.7 KiB
Diff
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From f81438c1a7a4fe921e887f431de63d42c38f8623 Mon Sep 17 00:00:00 2001
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From: Jiri Popelka <jpopelka@redhat.com>
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Date: Thu, 12 Sep 2013 13:25:17 +0200
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Subject: [PATCH] Bind 'dhclient -6' to link local address.
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When there are more 'dhclient -6' instances running
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(one instance per network interface),
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always only one of them gets all the packets
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(even those destined for the other instances).
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The exact behaviour depends on linux kernel version, either only the
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first or only the last started instance gets all the packets,
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but the problem remains.
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I think the problem is that DHCPv6 part of if_register_socket() binds to
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address from local_address6 variable but this variable has never been
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initialized so it's always 0.
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The solution could be to bind to link local address of interface.
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---
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common/socket.c | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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diff --git a/common/socket.c b/common/socket.c
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index f95665c..c4af83a 100644
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--- a/common/socket.c
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+++ b/common/socket.c
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@@ -134,6 +134,7 @@ if_register_socket(struct interface_info *info, int family,
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int sock;
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int flag;
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int domain;
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+ int i;
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#ifdef DHCPv6
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struct sockaddr_in6 *addr6;
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#endif
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@@ -165,6 +166,18 @@ if_register_socket(struct interface_info *info, int family,
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memcpy(&addr6->sin6_addr,
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&local_address6,
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sizeof(addr6->sin6_addr));
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+ /* bind client to link-local address */
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+ if (*do_multicast == 0) {
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+ for (i=0; i < info->v6address_count; i++) {
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+ if (IN6_IS_ADDR_LINKLOCAL(&info->v6addresses[i])) {
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+ memcpy(&addr6->sin6_addr,
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+ &info->v6addresses[i],
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+ sizeof(addr6->sin6_addr));
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+ addr6->sin6_scope_id = if_nametoindex(info->name);
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+ break;
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+ }
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+ }
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+ }
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#ifdef HAVE_SA_LEN
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addr6->sin6_len = sizeof(*addr6);
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#endif
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--
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1.8.3.1
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